Cita APA (7a ed.)

Sommerfeld, A., & Straus, E. G. (1964). Partial differential equations in physics. Academic Press.

Cita Chicago Style (17a ed.)

Sommerfeld, Arnold, y Ernst G. Straus. Partial Differential Equations in Physics. New York [etc.]: Academic Press, 1964.

Cita MLA (9a ed.)

Sommerfeld, Arnold, y Ernst G. Straus. Partial Differential Equations in Physics. Academic Press, 1964.